From: Joseph Caggiano Sent: Tuesday, August 20, 2024 3:05 PM To: tz@iana.org Cc: Douglas Weichert <dweichert@ups.com>; Autumn McPhillips <amcphillips@ups.com>; Matt Taylor <mxtaylor@ups.com>; Vinothkumar Vamanan <vinothkumarvamanan@ups.com> Subject: Europe/Dublin Hello, Our team has an application on a monthly basis which downloads the latest time zone tar file from IANA.org and processes the files to load tables with the time zones and rule information. We were recently informed our offset information for Europe/Dublin was incorrect. Based upon our team's analysis of this zone and rule, it appears the zone may be assigned to an incorrect rule (Eire). A similar zone, Europe/London, is assigned to the EU rule. [cid:image001.png@01DAF310.A356C510] Please advise if this information is accurate and if not, can it be updated. Thank you. Joe Caggiano Lead Data Engineer - CRD 201-828-2303 josephcaggiano@ups.com<mailto:josephcaggiano@ups.com>
On Wed, 21 Aug 2024 at 11:30, josephcaggiano--- via tz <tz@iana.org> wrote:
We were recently informed our offset information for Europe/Dublin was incorrect.
Our data for Europe/Dublin has been virtually unchanged for several years. We are not presently aware of any recent changes in Dublin that would cause these rules to generate incorrect timestamps. Are you able to provide any specific timestamps for which you've observed that these rules generate unexpected offset or wall-clock values for Dublin? These rules list Europe/Dublin as observing IST ("Irish Summer Time") on UTC+01:00 during most of the year, with the Eire ruleset currently applying winter time (GMT, or UTC+00:00) from late-October through late-March. -- Tim Parenti
On 2024-08-21 03:01 PM, Tim Parenti via tz wrote:
On Wed, 21 Aug 2024 at 11:30, josephcaggiano--- via tz <tz@iana.org> wrote:
We were recently informed our offset information for Europe/Dublin was incorrect.
Our data for Europe/Dublin has been virtually unchanged for several years. We are not presently aware of any recent changes in Dublin that would cause these rules to generate incorrect timestamps. Are you able to provide any specific timestamps for which you've observed that these rules generate unexpected offset or wall-clock values for Dublin?
These rules list Europe/Dublin as observing IST ("Irish Summer Time") on UTC+01:00 during most of the year, with the Eire ruleset currently applying winter time (GMT, or UTC+00:00) from late-October through late-March.
-- Tim Parenti
Keep in mind Dublin's negative DST when zic is built as "vanguard". See Zone Europe/Dublin -0:25:00 - LMT 1880 Aug 2 .... # Vanguard section, for zic and other parsers that support negative DST. 1:00 Eire IST/GMT This also applies to some other time zones as well. -Brooks
participants (3)
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Brooks Harris -
josephcaggiano＠ups.com -
Tim Parenti